/* =========================================
   CSS Custom Properties & Theme
   ========================================= */
:root {
    /* Colors */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-elevated: #1a1a25;
    --bg-hover: #222230;

    --primary: #8b5cf6;
    --primary-light: #a78bfa;
    --primary-dark: #7c3aed;
    --primary-glow: rgba(139, 92, 246, 0.4);
    --primary-glow-soft: rgba(139, 92, 246, 0.15);

    --accent: #06b6d4;
    --accent-glow: rgba(6, 182, 212, 0.3);

    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --border: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-serif: 'Playfair Display', Georgia, serif;

    /* Spacing */
    --container-max: 900px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Borders */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-bounce: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* =========================================
   Reset & Base Styles
   ========================================= */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    color: inherit;
}

/* =========================================
   Particle Canvas & Background
   ========================================= */
#particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.gradient-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
    background:
        radial-gradient(ellipse at 20% 20%, rgba(139, 92, 246, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(6, 182, 212, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(139, 92, 246, 0.03) 0%, transparent 70%);
}

/* =========================================
   Container
   ========================================= */
.container {
    position: relative;
    z-index: 10;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-md);
    min-height: 100vh;
}

/* =========================================
   Header
   ========================================= */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
    margin-bottom: var(--spacing-2xl);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-icon {
    font-size: 1.5rem;
    color: var(--primary);
    animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {

    0%,
    100% {
        filter: drop-shadow(0 0 8px var(--primary-glow));
        transform: scale(1);
    }

    50% {
        filter: drop-shadow(0 0 16px var(--primary-glow));
        transform: scale(1.1);
    }
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.daily-toggle,
.favorites-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition-base);
}

.daily-toggle:hover,
.favorites-btn:hover {
    background: var(--bg-elevated);
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.daily-toggle.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    box-shadow: 0 0 20px var(--primary-glow);
}

.daily-toggle svg,
.favorites-btn svg {
    width: 18px;
    height: 18px;
}

.fav-count {
    background: var(--primary);
    color: white;
    font-size: 0.75rem;
    padding: 2px 6px;
    border-radius: var(--radius-full);
    min-width: 20px;
    text-align: center;
}

/* =========================================
   Categories Section
   ========================================= */
.categories {
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
}

@media (max-width: 600px) {
    .category-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.category-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) var(--spacing-sm);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.category-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--primary-glow-soft), transparent);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.category-btn:hover {
    background: var(--bg-elevated);
    border-color: var(--primary);
    color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow:
        0 4px 20px rgba(0, 0, 0, 0.3),
        0 0 30px var(--primary-glow-soft);
}

.category-btn:hover::before {
    opacity: 1;
}

.category-btn.active {
    background: linear-gradient(135deg, var(--bg-elevated), var(--bg-secondary));
    border-color: var(--primary);
    color: var(--primary-light);
    box-shadow:
        0 0 25px var(--primary-glow),
        inset 0 0 20px var(--primary-glow-soft);
}

.cat-icon {
    font-size: 1.5rem;
    transition: transform var(--transition-bounce);
}

.category-btn:hover .cat-icon {
    transform: scale(1.2);
}

/* =========================================
   Quote Container
   ========================================= */
.quote-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
}

.quote-card {
    position: relative;
    width: 100%;
    padding: var(--spacing-2xl) var(--spacing-xl);
    background: linear-gradient(135deg, var(--bg-secondary), var(--bg-elevated));
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    text-align: center;
    backdrop-filter: blur(10px);
    box-shadow:
        0 4px 30px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.quote-card::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: var(--radius-xl);
    background: linear-gradient(135deg, var(--primary-glow-soft), transparent, var(--accent-glow));
    z-index: -1;
    opacity: 0;
    transition: opacity var(--transition-slow);
}

.quote-card.animate::before {
    opacity: 1;
}

.quote-content {
    position: relative;
}

.quote-mark {
    display: block;
    font-family: var(--font-serif);
    font-size: 4rem;
    font-style: italic;
    color: var(--primary);
    opacity: 0.3;
    line-height: 1;
    margin-bottom: -1rem;
}

.quote-text {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-style: italic;
    font-weight: 400;
    color: var(--text-primary);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
    transition: opacity var(--transition-base), transform var(--transition-base);
}

@media (max-width: 600px) {
    .quote-text {
        font-size: 1.25rem;
    }
}

.quote-author {
    display: inline-block;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    opacity: 0;
    transform: translateY(10px);
    transition: all var(--transition-base) 0.1s;
}

.quote-author.visible {
    opacity: 1;
    transform: translateY(0);
}

.quote-author::before {
    content: '— ';
    color: var(--primary);
}

.quote-category-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--primary-glow-soft);
    border: 1px solid var(--primary);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    opacity: 0;
    transform: scale(0.8);
    transition: all var(--transition-base);
}

.quote-category-badge.visible {
    opacity: 1;
    transform: scale(1);
}

/* Quote Animations */
.quote-card.fade-in .quote-text {
    animation: fadeInUp 0.5s ease forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.quote-card.scale-in .quote-text {
    animation: scaleIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* =========================================
   Quote Actions
   ========================================= */
.quote-actions {
    display: flex;
    gap: var(--spacing-sm);
    opacity: 0;
    transform: translateY(10px);
    transition: all var(--transition-base);
}

.quote-actions.visible {
    opacity: 1;
    transform: translateY(0);
}

.action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition-base);
}

.action-btn:hover {
    background: var(--bg-elevated);
    border-color: var(--primary);
    color: var(--text-primary);
    transform: scale(1.05);
    box-shadow: 0 0 20px var(--primary-glow);
}

/* =========================================
   Share Menu
   ========================================= */
.share-menu {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 100;
}

.share-menu.visible {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.share-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    white-space: nowrap;
    transition: all var(--transition-fast);
}

.share-option:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* =========================================
   Favorites Sidebar
   ========================================= */
.favorites-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.favorites-overlay.visible {
    opacity: 1;
    visibility: visible;
}

.favorites-sidebar {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    max-width: 380px;
    height: 100%;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border);
    z-index: 201;
    transform: translateX(100%);
    transition: transform var(--transition-base);
    display: flex;
    flex-direction: column;
}

.favorites-sidebar.visible {
    transform: translateX(0);
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border);
}

.sidebar-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.close-sidebar {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.close-sidebar:hover {
    background: var(--bg-elevated);
    color: var(--text-primary);
}

.favorites-list {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
}

.empty-favorites {
    text-align: center;
    color: var(--text-muted);
    padding: var(--spacing-2xl) var(--spacing-md);
    font-size: 0.9rem;
}

.favorite-item {
    padding: var(--spacing-md);
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.favorite-item:hover {
    border-color: var(--border-hover);
    transform: translateX(-4px);
}

.favorite-item .fav-quote {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 0.95rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    line-height: 1.5;
}

.favorite-item .fav-author {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.favorite-item .fav-remove {
    float: right;
    margin-top: -24px;
    padding: 4px;
    color: var(--text-muted);
    opacity: 0;
    transition: all var(--transition-fast);
}

.favorite-item:hover .fav-remove {
    opacity: 1;
}

.favorite-item .fav-remove:hover {
    color: #ef4444;
}

/* =========================================
   Toast Notification
   ========================================= */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--bg-elevated);
    border: 1px solid var(--primary);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 500;
    box-shadow: 0 0 30px var(--primary-glow);
    z-index: 300;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.toast.visible {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* =========================================
   Scrollbar Styling
   ========================================= */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-elevated);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--bg-hover);
}

/* =========================================
   Selection Styling
   ========================================= */
::selection {
    background: var(--primary);
    color: white;
}